Influence of AC-DC-AC Cycling with Hydrostatic Pressure on Accelerated Protective Performance Test of Glass Flake Epoxy Coating
Source abstract
Abstract
To achieve fast testing of the barrier properties of organic coatings, immersion tests, AC-DC-AC tests, and coupled tests of AC-DC-AC with hydrostatic pressure were conducted in seawater for a glass flake epoxy coating. Electrochemical impedance spectroscopy (EIS) was used to characterize the degradation processes of the coating during the tests, and the surface of the coating was analyzed using an optical microscope, scanning electron microscope (SEM), and a Fourier transform infrared spectrometer (FTIR). The results showed that periodic cathodic polarization coupled with high hydrostatic pressure can accelerate the degradation of a coating by facilitating the diffusion and uptake of electrolyte and the delamination of the coating. The coupled test method has the largest acceleration due to the synergetic effect of AC-DC-AC and hydrostatic pressure.
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Research context
OpenAlex topics: Corrosion Behavior and Inhibition · Smart Materials for Construction · Concrete Corrosion and Durability
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao 266237, China
School of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
Xiamen Sunrui Ship Coating Co., Ltd., Xiamen 361101, China
Funding
National Key R&D Program of China
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